feat期权标的白名单：可固定只显示 ETH 或 BTC。

Co-authored-by: Cursor <cursoragent@cursor.com>

app.py

@@ -3925,6 +3925,19 @@ def render_main_page(page="options", embed_mode=None):
     options_trading_btc = None
     options_margin_mode = "coin"
     options_underly = "ETH"
+    try:
+        from lib.options.options_underly_lib import (
+            parse_options_underlyings,
+            resolve_default_underly,
+        )
+
+        _options_uly_allowed = parse_options_underlyings()
+        _options_uly_default = resolve_default_underly(_options_uly_allowed)
+        options_underly = _options_uly_default
+    except Exception:
+        _options_uly_allowed = ["ETH", "BTC"]
+        _options_uly_default = OKX_OPTIONS_DEFAULT_UNDERLY or "ETH"
+        options_underly = _options_uly_default
     _sim_mode_for_header = False
     _exchange_display_for_header = EXCHANGE_DISPLAY_NAME
     try:
@@ -3955,7 +3968,8 @@ def render_main_page(page="options", embed_mode=None):
             options_trading_eth = _op.get("trading_eth")
             options_trading_btc = _op.get("trading_btc")
             options_margin_mode = _op.get("options_margin_mode") or "coin"
-            options_underly = _op.get("options_underly") or "ETH"
+            # 顶栏展示仍可用交易所包里的 underly;交易默认以白名单解析为准
+            options_underly = _options_uly_default or _op.get("options_underly") or "ETH"
         except Exception:
             options_trading_usdc = None
             options_funding_usdc = None
@@ -3965,7 +3979,7 @@ def render_main_page(page="options", embed_mode=None):
             options_trading_eth = None
             options_trading_btc = None
             options_margin_mode = "coin"
-            options_underly = "ETH"
+            options_underly = _options_uly_default
     recommended_capital = get_recommended_capital(capital_for_sizing)
     conn = get_db()
     key_list = (
@@ -4201,7 +4215,8 @@ def render_main_page(page="options", embed_mode=None):
         options_compound_full_cap_usdc=float(
             os.getenv("OKX_OPTIONS_COMPOUND_FULL_CAP_USDC") or "300"
         ),
-        options_default_underly=OKX_OPTIONS_DEFAULT_UNDERLY,
+        options_default_underly=_options_uly_default,
+        options_allowed_underlys=_options_uly_allowed,
         options_chain_ask_liq_filter=os.getenv(
             "OKX_OPTIONS_CHAIN_ASK_LIQ_FILTER_ENABLED", "true"
         ).lower()